HyOptic hybrid WDM with isolator is 3 ports passvie optical component based on TFF (Thin Film Filter) technology, which can combine 1550 signal and pump 980 into single fiber, which is used for EDFA.

Parameters	Unit	Limited Value
Insertion Ioss (single stage)	dB	≤0.9
Insertion Ioss (dual stage)	dB	≤1.0
Reflect Insertion Loss	dB	≤0.4
PDL(Polarization Dependent Loss)	dB	≤0.1
Reflect Isolation	dB	≥15
Directivity	dB	≥55